Question: I would like to see if there is a difference in reach and frequency depending on unit length. Can I do this in TView?

Answer: TView does not support this comparison. Generally speaking, there isn’t a difference in reach when comparing unit lengths (i.e. :30 vs. :15). For this reason, the tool does not support this optimization.

Different unit lengths will impact cost, to understand how you can use TView to break out costs for various unit lengths, see the FAQ article titled External_How do I illustrate cost differences for a plan with varied unit mixes